package pers.hlx.service.impl;

import java.util.Date;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.util.DigestUtils;
import pers.hlx.common.ErrorCode;
import pers.hlx.exception.BusinessException;
import pers.hlx.model.domain.User;
import pers.hlx.service.UserService;
import pers.hlx.mapper.UserMapper;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import static pers.hlx.contant.UserConstant.USER_LOGIN_STATE;

/**
 * @author HlX
 * @description 针对表【user(用户表)】的数据库操作Service实现
 * @createDate 2022-06-17 10:38:11
 */
@Service
@Slf4j
public class UserServiceImpl extends ServiceImpl<UserMapper, User>
        implements UserService {

    @Resource
    private UserMapper userMapper;
    private static final String SALT = "hlx";


    @Override
    public long userRegister(String userAccount, String userPassword, String checkPassword, String planetCode) {
        // 1.校验
        if (StringUtils.isAllBlank(userAccount, userPassword, checkPassword, planetCode)) {
            // TODO: 2022/6/19 修改为自定义异常
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "参数为空");
        }
        if (userAccount.length() < 4) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "用户账户过短");
        }
        if (userPassword.length() < 8 || checkPassword.length() < 8) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "用户密码过短");
        }
        if (planetCode.length() > 5) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "星球编号过长");
        }


        // 校验账户包含特殊字符
        String validPattern = "[ _`~!@#$%^&*()+=|{}':;',\\\\[\\\\].<>/?~！@#￥%……&*（）——+|{}【】‘；：”“’。，、？]";
        Matcher matcher = Pattern.compile(validPattern).matcher(userAccount);
        if (matcher.find()) {
            return -1;
        }

        //密码校验密码是否相同
        if (!userPassword.equals(checkPassword)) {
            return -1;
        }

        //账户不能重复
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("userAccount", userAccount);
        long count = userMapper.selectCount(queryWrapper);
        if (count > 0) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "账号重复");
        }

        //星球编号不能重复
        queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("planetCode", planetCode);
        count = userMapper.selectCount(queryWrapper);
        if (count > 0) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "编号重复");
        }

        // 对密码加密
        String encryptPassword = DigestUtils.md5DigestAsHex((SALT + userPassword).getBytes());

        // 插入数据
        User user = new User();
        user.setUserAccount(userAccount);
        user.setUserPassword(encryptPassword);
        user.setPlanetCode(planetCode);
        boolean saveResult = this.save(user);
        if (!saveResult) {
            return -1;
        }
        return user.getId();
    }

    @Override
    public User userLogin(String userAccount, String userPassword, HttpServletRequest request) {
        // 1.校验
        if (StringUtils.isAllBlank(userAccount, userPassword)) {
            return null;
        }
        if (userAccount.length() < 4) {
            return null;
        }
        if (userPassword.length() < 8) {
            return null;
        }


        // 校验账户包含特殊字符
        String validPattern = "[ _`~!@#$%^&*()+=|{}':;',\\\\[\\\\].<>/?~！@#￥%……&*（）——+|{}【】‘；：”“’。，、？]";
        Matcher matcher = Pattern.compile(validPattern).matcher(userAccount);
        if (matcher.find()) {
            return null;
        }


        // 2.对密码加密
        String encryptPassword = DigestUtils.md5DigestAsHex((SALT + userPassword).getBytes());
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("userAccount", userAccount);
        queryWrapper.eq("userPassword", encryptPassword);

        User user = userMapper.selectOne(queryWrapper);
        // 用户不存在
        if (user == null) {
            log.info("user login failed, userAccount cannot match userPassword");
            return null;
        }


        // 4.用户脱敏
        User safeUser = getSafeUser(user);

        // 4.记录用户登陆状态
        request.getSession().setAttribute(USER_LOGIN_STATE, safeUser);
        return safeUser;
    }

    @Override
    public User getSafeUser(User originUser) {
        if (originUser == null) {
            return null;
        }
        User safeUser = new User();
        safeUser.setId(originUser.getId());
        safeUser.setUsername(originUser.getUsername());
        safeUser.setUserAccount(originUser.getUserAccount());
        safeUser.setAvatarUrl(originUser.getAvatarUrl());
        safeUser.setGender(originUser.getGender());
        safeUser.setEmail(originUser.getEmail());
        safeUser.setPlanetCode(originUser.getPlanetCode());
        safeUser.setUserRole(originUser.getUserRole());
        safeUser.setUserStatus(originUser.getUserStatus());
        safeUser.setPhone(originUser.getPhone());
        safeUser.setCreateTime(originUser.getCreateTime());
        return safeUser;
    }

    @Override
    public int userLogout(HttpServletRequest request) {
        request.getSession().removeAttribute(USER_LOGIN_STATE);
        return 1;
    }
}




